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https://www.readbyqxmd.com/read/28549301/ecotoxicological-effect-of-ketamine-evidence-of-acute-chronic-and-photolysis-toxicity-to-daphnia-magna
#1
Shih-Wei Li, Yu-Hsiang Wang, Angela Yu-Chen Lin
Ketamine has been increasingly used in medicine and has the potential for abuse or illicit use around the world. Ketamine cannot be removed by conventional wastewater treatment plants. Although ketamine and its metabolite norketamine have been detected to a significant degree in effluents and aquatic environments, their ecotoxicity effects in aquatic organisms remain undefined. In this study, we investigated the acute toxicity of ketamine and its metabolite, along with the chronic reproductive toxicity of ketamine (5-100μg/L) to Daphnia magna...
May 23, 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/28549272/acute-toxicity-of-emerging-atmospheric-pollutants-from-wood-lignin-due-to-biomass-burning
#2
Maryline Pflieger, Ana Kroflič
Guaiacol (2-methoxyphenol) is an important atmospheric pollutant. It is the major component of wood lignin and is essentially emitted to the atmosphere during biomass burning. Its aging in the tropospheric aqueous phase leads to the generation of the following ring-retaining transformation products, also during nighttime: 4-nitroguaiacol, 6-nitroguaiacol, and dinitroguaiacol. This study presents the first toxicological data of guaiacol and its nitro derivatives and reveals their harmful potential for the ecosystem...
May 15, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/28546894/needs-and-challenges-for-assessing-the-environmental-impacts-of-engineered-nanomaterials-enms
#3
REVIEW
Michelle Romero-Franco, Hilary A Godwin, Muhammad Bilal, Yoram Cohen
The potential environmental impact of nanomaterials is a critical concern and the ability to assess these potential impacts is top priority for the progress of sustainable nanotechnology. Risk assessment tools are needed to enable decision makers to rapidly assess the potential risks that may be imposed by engineered nanomaterials (ENMs), particularly when confronted by the reality of limited hazard or exposure data. In this review, we examine a range of available risk assessment frameworks considering the contexts in which different stakeholders may need to assess the potential environmental impacts of ENMs...
2017: Beilstein Journal of Nanotechnology
https://www.readbyqxmd.com/read/28546039/relation-of-rice-intake-and-biomarkers-of-cadmium-for-general-population-in-korea
#4
Soo-Hwaun Kim, Young-Wook Lim, Kyung-Su Park, Ji-Yeon Yang
Environmental exposure to cadmium can cause renal damage. Foods containing cadmium are generally regarded as the main environmental sources of human exposure to cadmium. In this study, foods that are ingested in large amounts, including rice and other types of food with a high concentration of cadmium, were investigated to determine the correlation between the foods' cadmium content and biomarkers. The datasets required for this study, including blood cadmium concentration, biomarker concentration, and data on the amount of consumption by food item, were obtained from KNHNES...
April 29, 2017: Journal of Trace Elements in Medicine and Biology
https://www.readbyqxmd.com/read/28544916/electro-oxidative-determination-of-aromatic-amine-o-phenylenediamine-using-organic-inorganic-hybrid-composite
#5
Ragu Sasikumar, Palraj Ranganathan, Shen-Ming Chen, Syang-Peng Rwei, Muthukrishnan
A highly sensitive o-phenylenediamine (OPD) sensor based on a Fe3O4 doped with functionalized multi-walled carbon nanotubes (Fe3O4@f-MWCNTs) composite fabricated glassy carbon electrode (GCE) was developed. The modified Fe3O4@f-MWCNTs/GCE showed an enhanced current (Ipa) response toward OPD relative to that of a Fe3O4/GCE, f-MWCNTs/GCE, and a bare GCE. Under optimum conditions, the Fe3O4@f-MWCNTs/GCE showed a wide linear range remove at OPD concentrations of 0.6-80µM. The limit of detection and sensitivity of the f-MWCNTs/GCE, Fe3O4/GCE sensor were found to be 50µM, and 2...
May 17, 2017: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/28543985/advancing-the-quality-of-environmental-microplastic-research
#6
Kristin A Connors, Scott D Dyer, Scott E Belanger
Investigations into the environmental fate and effects of microplastics have been gaining momentum. Small, insoluble polymeric particles are implicated by scientists in a wide variety of studies that are used to suggest a potential for widespread impacts in freshwater and marine pelagic and sediment environments. An exponential growth in scientific publications and an increase in regulatory attention have occurred. However, despite these efforts, the environmental hazard of these particles is still unknown...
May 24, 2017: Environmental Toxicology and Chemistry
https://www.readbyqxmd.com/read/28543973/advancing-the-adverse-outcome-pathway-framework-an-international-horizon-scanning-approach
#7
Carlie A LaLone, Gerald T Ankley, Scott E Belanger, Michelle R Embry, Geoff Hodges, Dries Knapen, Sharon Munn, Edward J Perkins, Murray A Rudd, Daniel L Villeneuve, Maurice Whelan, Catherine Willett, Xiaowei Zhang, Markus Hecker
Our ability to conduct whole-organism toxicity tests to understand chemical safety has been outpaced by the synthesis of new chemicals for a wide variety of commercial applications. As a result, scientists and risk assessors are turning to mechanistically based studies to increase efficiencies in chemical risk assessment and making greater use of in vitro and in silico methods to evaluate potential environmental and human health hazards. In this context, the adverse outcome pathway (AOP) framework has gained traction in regulatory science because it offers an efficient and effective means for capturing available knowledge describing the linkage between mechanistic data and the apical toxicity end points required for regulatory assessments...
June 2017: Environmental Toxicology and Chemistry
https://www.readbyqxmd.com/read/28543641/updated-species-sensitivity-distribution-evaluations-for-acute-and-chronic-lead-toxicity-to-saltwater-aquatic-life
#8
Brian G Church, Patrick A Van Sprang, M Jasim Chowdhury, David K DeForest
The United States Environmental Protection Agency's (USEPA) ambient water quality criteria (AWQC) for lead (Pb) in saltwater were developed in 1984. The acute and chronic criteria are 210 µg/L and 8.1 µg/L dissolved Pb, respectively. Because data were limited in 1984, the chronic criterion was derived using an acute-chronic ratio (ACR), but there are now sufficient toxicity data such that an ACR is no longer needed. Based on the data now available, the proposed updated acute and chronic saltwater Pb AWQC (following USEPA methods) are 100 and 10 µg/L, respectively...
May 19, 2017: Environmental Toxicology and Chemistry
https://www.readbyqxmd.com/read/28542014/oak-ridge-reservation-environmental-protection-rad-neshaps-radionuclide-inventory-web-database-and-rad-neshaps-source-and-dose-database
#9
Patricia A Scofield, Linda L Smith, David N Johnson
The U.S. Environmental Protection Agency promulgated national emission standards for emissions of radionuclides other than radon from US Department of Energy facilities in Chapter 40 of the Code of Federal Regulations (CFR) 61, Subpart H. This regulatory standard limits the annual effective dose that any member of the public can receive from Department of Energy facilities to 0.1 mSv. As defined in the preamble of the final rule, all of the facilities on the Oak Ridge Reservation, i.e., the Y-12 National Security Complex, Oak Ridge National Laboratory, East Tennessee Technology Park, and any other U...
July 2017: Health Physics
https://www.readbyqxmd.com/read/28539107/a-feasibility-study-of-municipal-solid-waste-incineration-fly-ash-utilisation-in-estonia
#10
Hakan Berber, Ruedi Frey, Viktoria Voronova, Arina Koroljova
The purpose of this paper is to discuss the alternative environmental management options for the utilisation of municipal solid waste (MSW) incineration fly ash (FA), which is generated at Iru Power Plant where MSW is incinerated in Estonia. To determine sustainable and economically feasible environmental management options for MSW incineration FA in Estonia, CO2 sequestration with a further carbonation process was examined. A partial Cost & Benefit Analysis has been conducted to compare the carbonation process to the current situation...
May 1, 2017: Waste Management & Research
https://www.readbyqxmd.com/read/28536863/chemical-exposure-and-infant-leukaemia-development-of-an-adverse-outcome-pathway-aop-for-aetiology-and-risk-assessment-research
#11
REVIEW
Olavi Pelkonen, Andrea Terron, Antonio F Hernandez, Pablo Menendez, Susanne Hougaard Bennekou
Infant leukaemia (<1 year old) is a rare disease of an in utero origin at an early phase of foetal development. Rearrangements of the mixed-lineage leukaemia (MLL) gene producing abnormal fusion proteins are the most frequent genetic/molecular findings in infant B cell-acute lymphoblastic leukaemia. In small epidemiological studies, mother/foetus exposures to some chemicals including pesticides have been associated with infant leukaemia; however, the strength of evidence and power of these studies are weak at best...
May 23, 2017: Archives of Toxicology
https://www.readbyqxmd.com/read/28535209/aromatic-dna-adducts-and-breast-cancer-risk-a-case-cohort-study-within-the-epic-spain
#12
Antonio Agudo, Marco Peluso, Armelle Munnia, Leila Luján-Barroso, Aurelio Barricarte, Pilar Amiano, Carmen Navarro, María-José Sánchez, J Ramón Quirós, Eva Ardanaz, Nerea Larrañaga, María-José Tormo, María-Dolores Chirlaque, Miguel Rodríguez-Barranco, Emilio Sánchez-Cantalejo, Filippo Cellai, Catalina Bonet, Núria Sala, Carlos A González
Epidemiologic evidence linking environmental exposure to polycyclic aromatic hydrocarbons (PAH) with breast cancer is limited. Measurement of DNA adducts formed by aromatic compounds, including PAH, has been carried in breast tissue samples and white blood cells from women with breast cancer and different kinds of controls. However, these studies provide inconsistent results and bias cannot be ruled out. During the 7-year follow-up period, 305 women were diagnosed with first primary breast cancer in the EPIC-Spain cohort, and were compared with a sample of 149 women without breast cancer at recruitment, using a case-cohort approach...
May 23, 2017: Carcinogenesis
https://www.readbyqxmd.com/read/28535166/adult-height-prevalent-coronary-calcium-score-and-incident-cardiovascular-outcomes-in-a-multi-ethnic-cohort
#13
Joseph Yeboah, Michael J Blaha, Erin D Michos, Waqas Qureshi, Michael Miedema, Peter Flueckiger, Carlos J Rodriguez, Moyses Szklo, Alain G Bertoni
We assessed the relationships among adult height, coronary artery calcium (CAC) scores, incident atherosclerotic cardiovascular disease (ASCVD) events, and atrial fibrillation (Afib) in a multi-ethnic cohort. We used race/ethnicity -specific height (dichotomized by median and quartiles) as the predictor variable within the four race/ethnic groups in the Multi-Ethnic Study of Atherosclerosis (N = 6,814). After a mean of 10.2 years of follow-up (2000-2012), 556 ASCVD events (8.2%) and 539 afib events (7.9%) occurred...
May 23, 2017: American Journal of Epidemiology
https://www.readbyqxmd.com/read/28531798/environmental-hazard-assessment-of-a-marine-mine-tailings-deposit-site-and-potential-implications-for-deep-sea-mining
#14
Nélia C Mestre, Thiago L Rocha, Miquel Canals, Cátia Cardoso, Roberto Danovaro, Antonio Dell'Anno, Cristina Gambi, Francesco Regoli, Anna Sanchez-Vidal, Maria João Bebianno
Portmán Bay is a heavily contaminated area resulting from decades of metal mine tailings disposal, and is considered a suitable shallow-water analogue to investigate the potential ecotoxicological impact of deep-sea mining. Resuspension plumes were artificially created by removing the top layer of the mine tailings deposit by bottom trawling. Mussels were deployed at three sites: i) off the mine tailings deposit area; ii) on the mine tailings deposit beyond the influence from the resuspension plumes; iii) under the influence of the artificially generated resuspension plumes...
May 18, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28531649/a-bio-based-facile-approach-for-the-preparation-of-covalently-functionalized-carbon-nanotubes-aqueous-suspensions-and-their-potential-as-heat-transfer-fluids
#15
Rad Sadri, Maryam Hosseini, S N Kazi, Samira Bagheri, Nashrul Zubir, K H Solangi, Tuan Zaharinie, A Badarudin
In this study, we propose an innovative, bio-based, environmentally friendly approach for the covalent functionalization of multi-walled carbon nanotubes using clove buds. This approach is innovative because we do not use toxic and hazardous acids which are typically used in common carbon nanomaterial functionalization procedures. The MWCNTs are functionalized in one pot using a free radical grafting reaction. The clove-functionalized MWCNTs (CMWCNTs) are then dispersed in distilled water (DI water), producing a highly stable CMWCNT aqueous suspension...
March 14, 2017: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/28531345/plastic-and-human-health-a-micro-issue
#16
Stephanie L Wright, Frank J Kelly
Microplastics are a pollutant of environmental concern. Their presence in food destined for human consumption and in air samples has been reported. Thus, microplastic exposure via diet or inhalation could occur, the human health effects of which are unknown. The current review article draws upon cross-disciplinary scientific literature to discuss and evaluate the potential human health impacts of microplastics and outlines urgent areas for future research. Key literature up to September 2016 relating to bioaccumulation, particle toxicity, and chemical and microbial contaminants were critically examined...
May 22, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28525814/risk-assessment-of-triclosan-in-the-global-environment-using-a-probabilistic-approach
#17
Jiahua Guo, Hisato Iwata
The occurrence of antimicrobial agent triclosan (TCS) in the global aquatic and terrestrial environment is an emerging concern. While risk assessment for TCS is available in certain countries, no studies have attempted to assess the risk of TCS worldwide. This could be due to lack of method to characterize the global exposure. The present study therefore proposed a probabilistic-based approach to approximate the percent-ranked measured environmental concentrations (MECs) by estimating exposure concentration distribution (ECD) for different environmental compartments on a global scale, incorporating approximate 1200 single MECs...
May 16, 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/28525808/characterization-of-post-disaster-environmental-management-for-hazardous-materials-incidents-lessons-learnt-from-the-tianjin-warehouse-explosion-china
#18
Hui Zhang, Huabo Duan, Jian Zuo, MingWei Song, Yukui Zhang, Bo Yang, Yongning Niu
Hazardous Materials Incidents (HMIs) have attracted a growing public concern worldwide. The health risks and environmental implications associated with HMIs are almost invariably severe, and underscore the urgency for sound management. Hazardous Materials Explosion incidents (HMEIs) belong to a category of extremely serious HMIs. Existing studies placed focuses predominately on the promptness and efficiency of emergency responses to HMIs and HMEIs. By contrast, post-disaster environmental management has been largely overlooked...
May 16, 2017: Journal of Environmental Management
https://www.readbyqxmd.com/read/28525627/geographic-patterns-of-autism-spectrum-disorder-among-children-of-nurses-health-study-ii-women
#19
Kate Hoffman, Marc G Weisskopf, Andrea L Roberts, Raanan Raz, Jaime E Hart, Kristen Lyall, Elin M Hoffman, Francine Laden, Verónica M Vieira
Data indicate that autism spectrum disorder (ASD) prevalence may be increasing and varies geographically. We investigated associations between residential location and ASD in the children of Nurses' Health Study II women in order to generate hypotheses about social and environmental factors related to etiology or diagnosis. Analyses included 13,507 children born from 1989-1999 (486 with ASD). We explored relationships between ASD and residential location at both birth and age 6 years (i.e. closer to average diagnosis age)...
May 19, 2017: American Journal of Epidemiology
https://www.readbyqxmd.com/read/28523418/breast-cancer-and-exposure-to-tobacco-smoke-during-potential-windows-of-susceptibility
#20
Alexandra J White, Aimee A D'Aloisio, Hazel B Nichols, Lisa A DeRoo, Dale P Sandler
PURPOSE: An association between smoking and breast cancer is unresolved, although a higher risk from exposure during windows of susceptibility has been proposed. The objective of this prospective study was to evaluate the association between tobacco smoke and breast cancer with a focus on timing of exposure, especially during early life. METHODS: Sister study participants (n = 50,884) aged 35-74 were enrolled from 2003 to 2009. Women in the United States and Puerto Rico were eligible if they were breast cancer-free but had a sister with breast cancer...
May 18, 2017: Cancer Causes & Control: CCC
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